#include <iostream>
#include <cmath>
using namespace std;
int main() {
int t;
string str;
cin>>t;
while(t--){
int a=0, b=0;
cin>>str;
for(int i=0;i<str.size();i++){
if(str[i]=='a')
a++;
else
b++;
}
cout<<min(a,b)<<"\n";
}
return 0;
}
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